@import url(http://fonts.googleapis.com/css?family=Open+Sans);
html,
body {
    height: 100%;
    margin: 0;
    position: relative;
    background: #222;
    font-family: "Open Sans";
}
#wrap {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}
#wrap p {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    color: rgba(255, 255, 255, 0.5);
    font-size: 30px;
    text-transform: uppercase;
    letter-spacing: 5px;
    text-align: center;
}
.ball {
    pointer-events: none;
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: gray;
    animation: implode 1s ease-in-out;
    animation-fill-mode: both;
    opacity: 0.5;
}
@keyframes implode {
    100% {
        transform: scale(0);
    }
}